package test;

import javax.swing.JOptionPane;

public class CountEachLetter {
	/**  Main method */
	public static void main(String[] args) {
		// Prompt the user to enter a string
		String s = JOptionPane.showInputDialog("Enter a string:");

		// Invoke the countLetters method to count each letter
		int[] counts = countLetters(s.toLowerCase());
		
		// Declare and initialize output string
		String output = "";
		
		// Display results
		for (int i = 0; i < counts.length; i++) {
			if (counts[i] != 0)
				output += (char)('a' + i) + " appears " +
				counts[i] + ((counts[i] == 1) ? " time\n" : " times\n");
		}

		// Display the result
		JOptionPane.showMessageDialog(null, output);
	}

	// Count each letter in the string
	public static int[] countLetters(String s) {
		int[] counts = new int[26];

		for (int i = 0; i < s.length() ; i++) {
			if (Character.isLetter(s.charAt(i)))
				counts[s.charAt(i) - 'a']++;
		}
		
		return counts;
	}
}



